Explanation:- The fuzzy intersection of two fuzzy sets A and B on universe of discourse,

X: μA∩B(x) = min [μA(x), μB(x)] , where x∈XBut here in the question, they are asking for complement of A∩B and so the answer would be 1-min[A(x),B(x)]. The minimum of 0.2 and 0.1 will be 0.1, and 1-0.1 will be 0.9.

The second value is min(0.4,0.3)=0.3 and 1-0.3=0.7The third value is min(0.8,0.6)=0.6 and 1-0.6=0.4The fourth value is min(0.5,0.3)=0.3 and 1-0.3=0.7The fifth value is min(0.1,0.2)=0.1 and 1-0.1=0.9So the option is (A) which having { 0.9,0.7,0.4,0.7,0.9}. Its ok if fourth value is 0.8 instead of 0.8.